• Àüü
  • ÀüÀÚ/Àü±â
  • Åë½Å
  • ÄÄÇ»ÅÍ
´Ý±â

»çÀÌÆ®¸Ê

Loading..

Please wait....

±¹³» ³í¹®Áö

Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Current Result Document : 1 / 2

ÇѱÛÁ¦¸ñ(Korean Title) º¯Á¶·¹º§ Á¦¾î ´ÙÁ߹ݼÛÆÄ CDMA ½Ã½ºÅÛ
¿µ¹®Á¦¸ñ(English Title) Modulation Level-Controlled Multicarrier CDMA System
ÀúÀÚ(Author) ÃÖ±¤¼ø   ÀÌ»ó¿ø   ¹Ú¿µÃæ   Á¤±¤¸ð   Kwang-Soon Choi   Sang-Won Lee   Young-Choong Park   Kwang-Mo Jung   ȲºÀÁØ   ¹ÚÇü±Ù   Bong Jun Whang   Hyung-Kun Park  
¿ø¹®¼ö·Ïó(Citation) VOL 12 NO. 09 PP. 1646 ~ 1653 (2008. 09)
Çѱ۳»¿ë
(Korean Abstract)
º» ³í¹®¿¡¼­´Â Àü¼Û ä³ÎÀÇ ÁÖÆļö ¼±ÅÃÀû Ư¼º¿¡ ÀÇÇÑ Àü¼Û ½ÅÈ£ÀÇ ¿Ö°îÇö»óÀ» ÁÙÀ̸ç, ´Ù¾çÇÑ ¹«¼± Àü¼Û ȯ°æ¿¡ ´ëÇØ ÀÏÁ¤ÇÑ Àü¼Û Ç°ÁúÀ» À¯Áö½ÃÅ°´Â µ¿½Ã¿¡ ÃÖ´ë µ¥ÀÌÅÍ Àü¼Û·üÀ» Á¦°øÇÒ ¼ö ÀÖ´Â ´ÙÁß ¹Ý¼ÛÆÄ CDMAÀ» Á¦¾ÈÇÑ´Ù. ÀÌ ½Ã½ºÅÛÀº ä³Î »óÅ¿¡ µû¶ó ÀÛÀº Áö¿¬°ú ÆäÀ̵ùÀ» °Þ´Â ä³Î¿¡¼­´Â ³ôÀº µ¥ÀÌÅÍ Àü¼Û·ü·Î Àü¼ÛÇÏ°í, ¹Ý¸é ºü¸¥ ÆäÀ̵ù°ú ±ä Áö¿¬ ¼ººÐÀ» °®´Â ä³Î¿¡¼­´Â ³·Àº Àü¼Û·ü·Î µ¥ÀÌÅ͸¦ Àü¼ÛÇÑ´Ù. µÎ °æ¿ì ¸ðµÎ ´Ù ¼Û½Å±â ±¸Á¶¿¡¼­ µ¥ÀÌÅÍ Á÷º´·Ä º¯È¯ °³¼ö¿Í µ¥ÀÌÅÍ º¹»ç °³¼ö¸¦ Á¶ÀýÇÔÀ¸·Î½á °¡´ÉÇÏ´Ù. ¿©±â¼­, Á¦¾ÈÇÑ ½Ã½ºÅÛÀº °íÁ¤µÈ ¼öÀÇ ºÎ¹Ý¼ÛÆĸ¦ °®´Â´Ù. µû¶ó¼­ À§¿¡¼­ ¾ð±ÞÇÑ Á÷º´·Ä º¯È­ °³¼ö¿Í µ¥ÀÌÅÍ º¹»ç °³¼öÀÇ °öÀº Ç×»ó ÀÏÁ¤ÇÏ°Ô À¯ÁöµÇ¹Ç·Î Çϵå¿þ¾îÀÇ º¯Çü ¾øÀÌ ±¸ÇöµÉ ¼ö ÀÖ´Ù. Á¦¾ÈÇÑ ½Ã½ºÅÛ¿¡¼­´Â Á÷º´·Ä º¯È¯ ÈÄ µ¿ÀÏ µ¥ÀÌÅÍ°¡ ¿©·¯ ´Ù¸¥ ºÎ¹Ý¼ÛÆÄ¿¡ º¹»çµÇ¾î Àü¼ÛµÇ¹Ç·Î ÁÖÆļö ´ÙÀ̹ö½ÃƼ À̵æÀ» ¾òÀ» ¼ö ÀÖÀ¸¸ç, ·¹ÀÌÅ©(RAKE) ¼ö½Å±¸Á¶´Â °æ·Î ´ÙÀ̹ö½ÃƼ À̵浵 ¾òÀ» ¼ö ÀÖ°Ô ÇÑ´Ù.
¿µ¹®³»¿ë
(English Abstract)
In this paper, we propose multicarrier CDMA system using the concept of the modulation level-controlled system in order to make the system robust to the frequency selectivity and to provide a maximum data rate maintaining an acceptable transmission quality over various channel environments. This system selects higher data rate when the channel experiences the low delay spread and slow fading. On the other hand, when the fading changes very fast and the delay spread is very long, the system selects lower data rate. In both cases, the system controls the number of serial-to-parallel converted streams and the number of fed streams. This system has the fixed number of sub-carriers. So the product of the number of serial-to-parallel converted streams and the number of fed streams is always kept constant. With the same data fed at different sub-carriers, the frequency diversity is achieved. And a RAKE receiver also is utilized to achieve path (time) diversity.
Å°¿öµå(Keyword) Energy Saving System   ESS   IEC TS 62654   EPCM   ¿¡³ÊÁöÀý°¨½Ã½ºÅÛ   multicarrier CDMA   Rake receiver   diversity   modulation level control  
ÆÄÀÏ÷ºÎ PDF ´Ù¿î·Îµå